dc motor speed control switch

... only the torque is controlled without speed control, the time range of control system under transient state is selected short. The motor speeds up to a very large value if the motor is run longer ... four -switch DTC of a BLDC motor drive in the constant torque region. II. T HE P ROPOSED FOUR - SWITCH D IRECT T ORQUE C ONTROL OF BLDC M OTOR D RIVE A. Principles of the Proposed Four -Switch ... BLDC motor drive using four -switch inverter with faster torque response due to the fact that the voltage space vectors are directly controlled. Therefore, the direct torque controlled four-switch...

Ngày tải lên: 03/01/2014, 19:46

... schematic diagram of a DC motor is shown in Figure 6. Figure 6. Schematic Diagram of a DC Motor Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 10 • ... root-locus domain. Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 24 Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System 1. Introduction This ... Craig DC Motor / Tachometer Closed-Loop Speed Control System 11 The DC motor/ tachometer system has a single input and a single output. The input is the voltage applied across the two motor...

Ngày tải lên: 25/01/2014, 13:20

... B r e r v r B r I r F r B r v r e r B r I r F r Đặc tính cơ của động cơ DC kích từ nối tiếp Example 4: Example 5: Đặc tính cơ 4 phần tư ...

Ngày tải lên: 17/12/2013, 14:15

Ngày tải lên: 18/12/2013, 22:06

Ngày tải lên: 03/01/2014, 19:44

Ngày tải lên: 03/01/2014, 19:44

... conduction DTC of BLDC motor drive with six -switch inverter scheme. Keywords: Brushless dc (BLDC) motor, sliding mode observer, direct torque control (DTC), stator flux control, fast torque ... Block Indirect torque control method of BLDC motor explained in [9] was extended to a direct torque and indirect flux control technique for six -switch inverter BLDC motor in [7] which is suitable ... the sensorless three-phase conduction DTC of a BLDC motor drive with six -switch inverter. 2. The Proposed Sensorless DTC of Four -Switch BLDC Motor Drive Using Three-Phase Conduction 2.1 Principles...

Ngày tải lên: 03/01/2014, 19:45

... force (EMF), position-sensorless control, stator flux control, torque pulsation. I. I NTRODUCTION T HE permanent-magnet synchronous motor (PMSM) and brushless dc (BLDC) motor drives are used extensively ... INDIRECT FLUX CONTROL OF BRUSHLESS DC MOTOR 355 TAB L E I S WITCHING T ABLE FOR DTC OF BLDC M OTOR U SING T HREE - PHASE C ONDUCTION indirectly kept at its optimum level, while the motor speed is less ... programming-based control of brushless motors,” IEEE Trans. Control Syst. Technol., vol. 11, no. 1, pp. 139–146, Jan. 2003. [19] S. J. Kang and S. K. Sul, “Direct torque control of brushless dc motor with nonideal...

Ngày tải lên: 03/01/2014, 19:46

... motor that is fed by square-wave current and it is often called Brushless DC Motor (BLDCM). The main difference between two kinds of motors from the control viewpoint resides on current control ... conventional control system for BLDC motor (Fig. 2). The motor is fed by a PWM-controlled MOSFET inverter. As we can see in Figs. 2 and 3, the currents are controlled by 3 current controllers ... machine, Vector control, Pseudo-vector control, Torque ripple minimization. I. I NTRODUCTION A. Sine-wave PM Motor vs. Square-wave Motor: Vector Control vs. Phase Current Control With the...

Ngày tải lên: 03/01/2014, 19:46

... Setup ADC (bank1) movlw B’00001110’ ; ADC left justified, AN0 only movwf ADCON1 banksel ADCON0 ; setup ADC (bank0) movlw B’11000001’ ; ADC clock from int RC, AN0, ADC on movwf ADCON0 bsf ADCON0,GO ... reading ;********************************************************************** ;* ;* Main control loop ;* Loop call ReadADC ; get the speed control from the ADC incfsz ADC,w ; if ADC is 0xFF we’re at full speed - skip timer add goto PWM ; add Timer0 to ADC for PWM movf ... the speed control potentiometer ;* and start the next reading ;* btfsc ADCON0,NOT_DONE ; is ADC ready? return ; no - return movf ADRESH,w ; get ADC result bsf ADCON0,GO ; restart ADC movwf ADC...

Ngày tải lên: 30/03/2014, 07:20

Ngày tải lên: 22/05/2014, 18:05

Ngày tải lên: 09/07/2014, 20:20

... CAP-P7 1000 7805 IN 1 OUT 3 G N D 2 U4 7805 GND CAP-P6 10U CAP4 104 VCC R6 330R LED1 LED T1 TIP42 R5 10R 2 1 3 4 P O W E R 1 CONN-SIL4 Control 1 Control 2 Hình 4.6 Sơ đồ nguyên lý mạch nguồn 5V Khối này là mạch điện dùng để ổn áp điện thế ... thay vì nhập xuất dữ liệu. - Chân 30 : AVCC cấp điện áp so sánh cho bộ ADC. - Chân 32 : AREF điện áp so sánh tín hiệu vào ADC. - Chân 33 đến 40 : Cổng vào ra dữ liệu song song A ( PORTA ) ngoài ... tín hiệu số ADC ( analog to digital converter) b. Vào ra của vi điều khiển PORTA ( PA7 … PA0 ) : là các chân số 33 đến 40. Là cổng vào ra song song 8 bít khi không dùng ở chế độ ADC. Bên trong...

Ngày tải lên: 23/04/2013, 14:48

... cổng. VD3: Sử dụng thanh ghi CC 80C537, có thể đạt 5kHz. DC Motor - PWM illustration By Lê Anh Tuấn 12/2002 DC Motor - Brushless DC Động cơ một chiều không chổi than không được cấp liên tục ... 12/2002 DC Motor - Practical1 VI MẠCH 555/556 Tạo ra các xung đều nhau, tần số CRR f BA )( 49.1 + = Tạo ra xung có bề rộng ΔT khi có xung vào chân trigger ΔT=1.1RC By Lê Anh Tuấn 12/2002 DC Motor ... 12/2002 DC Motor - Practical2 PWM SỬ DỤNG IC 555 Mạch dùng điều khiển động cơ 6V, 0.5 A với đầu vào Vin=9V U1: tạo nhịp, chính là tần số làm việc U2: Chu kỳ làm việc By Lê Anh Tuấn 12/2002 DC Motor...

Ngày tải lên: 28/10/2013, 05:15

... drawback to SWDC motors is that they do not have precise speed control like PMDC and SHWDC motors have. FIGURE 4: SERIES-WOUND DC MOTORS Armature Brush Permanent Magnet Poles DC Voltage Supply Armature Brush Shunt Field DC Voltage Supply Armature Brush Series Field DC Voltage Supply  ... electric motor types (i.e., brushless DC, AC induction), BDC motors do not require a controller to switch current in the motor windings. Instead, the commutation of the windings of a BDC motor is ... generally more robust than PMDC motors. FIGURE 3: SHUNT-WOUND DC MOTORS Series-Wound Series-wound Brushed DC (SWDC) motors have the field coil in series with the armature. These motors are ideally suited...

Ngày tải lên: 22/12/2013, 14:15

Ngày tải lên: 28/12/2013, 22:07

...  Overview of Gas Springs 2 . 21369 . 2007 . 1  Speed Control TM « SPC Gas Springs, cushioned 2486.12. FIBRO SPC Gas Springs Speed Control TM « are designed to reduce or eliminate the ... caused by the increased return travel speed in high speed presses (link drive presses). SPC Gas Springs feature an integral return travel delay which reduces the speed of the gas spring to 0.4 m/s ... 2 . 21370 . 2007 . 1  3 Speed Control TM « SPC Gas Springs, 2486.12. cushioned subject to alterations Force in daN at Piston...

Ngày tải lên: 22/01/2014, 02:20

Ngày tải lên: 16/03/2014, 12:20

... 18 Contents 9715E Issue 2 DC Motors 2 Page Introduction DC motor range 3 DC motor selection MKlll range 4 Which DC motor? 4 Standards and Environment Enclosure 5 Insulation 5 Thermal Rating 5 Motor Cooling ... 13 9715E Issue 2 DC Motors 12 MKlll Range General The MKIII range of dc metric motors provides exceptionally high outputs per unit weight combined with complete flexibility of speed control. MKIII ... see page 24 9715E 8/4/05 2:42 pm Page 25 9715E Issue 2 DC Motors 13 Brushwear derection system for MKlll DC motors All the benefits of DC drives with low maintenance The Bull Electric Brushwear...

Ngày tải lên: 20/03/2014, 11:58

Ngày tải lên: 21/06/2014, 17:20